WO2011037981A3 - Fast response capacitive gauging system featuring steep slope filter discrimination circuit - Google Patents

Fast response capacitive gauging system featuring steep slope filter discrimination circuit Download PDF

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Publication number
WO2011037981A3
WO2011037981A3 PCT/US2010/049795 US2010049795W WO2011037981A3 WO 2011037981 A3 WO2011037981 A3 WO 2011037981A3 US 2010049795 W US2010049795 W US 2010049795W WO 2011037981 A3 WO2011037981 A3 WO 2011037981A3
Authority
WO
WIPO (PCT)
Prior art keywords
steep slope
slope filter
gauging system
fast response
discrimination circuit
Prior art date
Application number
PCT/US2010/049795
Other languages
French (fr)
Other versions
WO2011037981A2 (en
Inventor
Gerald F. Hermann
Daniel R Buckley
Christopher R. D. Miller
Keith A. Jefferies
Original Assignee
Laser Mechanisms, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Laser Mechanisms, Inc. filed Critical Laser Mechanisms, Inc.
Priority to EP10819376.4A priority Critical patent/EP2480859B1/en
Publication of WO2011037981A2 publication Critical patent/WO2011037981A2/en
Publication of WO2011037981A3 publication Critical patent/WO2011037981A3/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/023—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring distance between sensor and object
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/03—Observing, e.g. monitoring, the workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
    • B23K26/046—Automatically focusing the laser beam
    • B23K26/048—Automatically focusing the laser beam by controlling the distance between laser head and workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B23K26/1462—Nozzles; Features related to nozzles
    • B23K26/1464—Supply to, or discharge from, nozzles of media, e.g. gas, powder, wire

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Laser Beam Processing (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

The high speed, high accuracy capacitive gauging system employs an oscillator fed through steep slope filter that is discriminates between very small changes in capacitance even in the presence of electrical noise. During intervals when the probe tip is retracted, the oscillator frequency is calibrated to match the sweet spot in the center of the linear operative region of the steep slope filter. This calibrates the system to overcome the effects of varying temperature and humidity in the manufacturing environment.
PCT/US2010/049795 2009-09-22 2010-09-22 Fast response capacitive gauging system featuring steep slope filter discrimination circuit WO2011037981A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10819376.4A EP2480859B1 (en) 2009-09-22 2010-09-22 Fast response capacitive sensing system featuring steep slope filter discrimination circuit

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US24474209P 2009-09-22 2009-09-22
US61/244,742 2009-09-22
US12/887,780 2010-09-22
US12/887,780 US8405409B2 (en) 2009-09-22 2010-09-22 Fast response capacitive gauging system featuring steep slope filter discrimination circuit

Publications (2)

Publication Number Publication Date
WO2011037981A2 WO2011037981A2 (en) 2011-03-31
WO2011037981A3 true WO2011037981A3 (en) 2011-10-20

Family

ID=43796461

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2010/049795 WO2011037981A2 (en) 2009-09-22 2010-09-22 Fast response capacitive gauging system featuring steep slope filter discrimination circuit

Country Status (3)

Country Link
US (1) US8405409B2 (en)
EP (1) EP2480859B1 (en)
WO (1) WO2011037981A2 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9267975B2 (en) 2009-09-22 2016-02-23 Laser Mechanisms, Inc. Fast response capacitive gauging system featuring steep slope filter discrimination circuit
US9003936B2 (en) * 2011-07-29 2015-04-14 Flow International Corporation Waterjet cutting system with standoff distance control
EP2776207B1 (en) * 2011-11-10 2019-03-27 IPG Photonics Corporation Dynamic height adjusting system and method for a head assembly of a laser processing system
EP2777861B1 (en) * 2013-03-15 2016-11-02 Laser Mechanisms, Inc. Fast response capacitive gauging system featuring steep slope filter discrimination circuit
JP6190707B2 (en) * 2013-11-29 2017-08-30 株式会社アマダホールディングス Reference member for sensor calibration and sensor calibration method
US9884406B2 (en) 2014-01-15 2018-02-06 Flow International Corporation High-pressure waterjet cutting head systems, components and related methods
CN104507221B (en) * 2014-12-17 2017-01-18 大同裕隆环保有限责任公司 Combined mining anti-explosion and intrinsic safety type tunnel lamp
JP6397776B2 (en) * 2015-02-12 2018-09-26 株式会社アマダホールディングス Calibration jig, calibration method, and laser processing machine
US10596717B2 (en) 2015-07-13 2020-03-24 Flow International Corporation Methods of cutting fiber reinforced polymer composite workpieces with a pure waterjet
WO2017195001A1 (en) 2016-05-13 2017-11-16 Arcelormittal Method for obtaining a height of a material stacked in a coke oven
CN106814463B (en) * 2016-12-29 2019-03-08 华中科技大学 Automatic adjusument spatial filter and high-power RF CO slab2Laser
US11014194B2 (en) 2017-11-02 2021-05-25 Coherent, Inc. Laser material processing distance gauge
DE102018125620A1 (en) * 2018-10-16 2020-04-16 Schuler Pressen Gmbh Method and device for cutting a sheet metal blank from a continuously conveyed sheet metal strip
CN109590619B (en) * 2018-12-06 2021-08-03 大族激光科技产业集团股份有限公司 Cutting head height control method and laser cutting machine
CN109631734B (en) * 2019-01-02 2021-04-09 上海坤锐电子科技有限公司 Displacement detection device and displacement detection method
CN110039190B (en) * 2019-04-03 2021-05-28 大族激光科技产业集团股份有限公司 Laser cutting control method and device and computer readable storage medium

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5428280A (en) * 1992-08-14 1995-06-27 Lumonics Corporation Robotic movement of object over a workpiece surface
JPH07195188A (en) * 1993-11-26 1995-08-01 Precitec Gmbh Work manufacture method by laser beam
US5942975A (en) * 1995-09-25 1999-08-24 Soerensen; Joern Method and a device for sensing the distance between a first object and a second object
US20010024126A1 (en) * 2000-02-15 2001-09-27 Georg Sporl Temperature compensation in the context of capacitive distance measurement with the aid of an LC oscillator
US6304091B1 (en) * 1998-02-10 2001-10-16 Immersion Corporation Absolute position sensing by phase shift detection using a variable capacitor
US20030102294A1 (en) * 2001-05-23 2003-06-05 Yoshihide Kinbara Laser machining apparatus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9419477U1 (en) * 1994-12-05 1995-02-02 Precitec Gmbh Torch with distance sensors for machining a workpiece
KR100471018B1 (en) * 2000-11-28 2005-03-08 스미도모쥬기가이고교 가부시키가이샤 Gap adjustment apparatus and gap adjustment method for adjusting gap between two objects
DE10121655C1 (en) 2001-05-03 2002-10-31 Precitec Kg Process, for controlling a laser processing device, comprises placing the sensor electrode on the laser processing head, measuring a minimal measuring capacity, comparing with an actual capacity, and processing a command signal
US8244494B2 (en) 2007-04-06 2012-08-14 Hypertherm, Inc. Plasma insensitive height sensing

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5428280A (en) * 1992-08-14 1995-06-27 Lumonics Corporation Robotic movement of object over a workpiece surface
JPH07195188A (en) * 1993-11-26 1995-08-01 Precitec Gmbh Work manufacture method by laser beam
US5942975A (en) * 1995-09-25 1999-08-24 Soerensen; Joern Method and a device for sensing the distance between a first object and a second object
US6304091B1 (en) * 1998-02-10 2001-10-16 Immersion Corporation Absolute position sensing by phase shift detection using a variable capacitor
US20010024126A1 (en) * 2000-02-15 2001-09-27 Georg Sporl Temperature compensation in the context of capacitive distance measurement with the aid of an LC oscillator
US20030102294A1 (en) * 2001-05-23 2003-06-05 Yoshihide Kinbara Laser machining apparatus

Also Published As

Publication number Publication date
US8405409B2 (en) 2013-03-26
EP2480859B1 (en) 2018-07-18
US20110089956A1 (en) 2011-04-21
EP2480859A4 (en) 2017-03-22
EP2480859A2 (en) 2012-08-01
WO2011037981A2 (en) 2011-03-31

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